Unit 1 Exam 2025 With Correct Answers
A cell - correct answer A fundamental unit of life. The smallest structural and functional unit of an organism,
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which is typically micrographic and consists of cytoplasm and a nucleus enclosed in a membrane
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An Organelle - correct answer A structure within a shell that performs a specific function.
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Tissue - correct answer A group of the same/similar cells that performs specific functions.
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Eukaryotic Cell - correct answer A cell which contains a distinctive membrane bound nucleus. Most also contain
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membrane bound organelles. They are found in plants, animals, fungi and protists.
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Prokaryotic cell - correct answer A single celled organism. A cell characterised by the absence of membrane-
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bound nucleus and membrane bound organelles. Bacteria and cyanobacteria are prokaryotic.
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Cell membrane - correct answer 1) Regulates the movement of substances into and out of the cell.
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, 2) It also has receptor molecules on it, which allow it to respond to chemicals like hormones.
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Cell Wall - correct answer 1) Supports the structure of plant cells by making it more rigid.
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Nucleus - correct answer 1) The nucleus controls the cells activity.
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2) The nuclear pores allow substances (RNA) which is made in the nucleolus) to move between the nucleus and
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the cytoplasm.
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Nucleolus - correct answer 1) Makes the ribosomes which are then excreted through the nuclear pore.
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2) The factory of proteins.
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Cytoplasm - correct answer A jellylike fluid inside the cell in which the organelles are suspended.
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the place in the cell where most of the chemical reactions take place.
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fills out the cell and keeps organelles in their place.
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Mitochondria - correct answer Site of aerobic respiration l l l l l l l
Ribosome - correct answer Site of protein synthesis l l l l l l l
Smooth Endoplasmic Reticulum (SER) - correct answer Synthesises and processes lipids.
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Rough Endoplasmic Reticulum (RER) - correct answer folds and processes proteins that have been made at the
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ribosomes.